Gas or other explosive engine



(No Model.)

M. BLAKEY.

GAS OR OTHER EXPLOSIVE ENGINE. No. 580,172. Patented Apr. 6, 1897.

UNITED STATES v PATENT OFFICE.

MILDRED BLAKEY, OF PITTSBURG, PENNSYLVANIA.

GAS OR OTHER EXPLOSIVE ENGINE.

SPECIFICATION forming part of Letters Patent N 0. 580,172, dated April 6, 1897. Application filed July 10, 1896. Serial No. 598,687. (No model.)

To all whom it may concern.-

Be it known that I, MILDRED BLAKE Y,a citizen of the United States, residing at Pittsburg, in the county of Allegheny and State of Pennsylvania, have invented certain new and useful Improvements in Gas or other Explosive Engines; and I do declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, and to the figures of reference marked thereon, which form a part of this specification.

My invention relates to improvements in gas or other explosive engines, a description of which will be fully shown and described in the accompanying drawings and specification, in which Figure 1 is a sectional view through the cylinder and showing my improvements. Fig. 2 is a side view of the same. Fig. 3 is an end view of the same. Fig. 4 is an end sectional view of a portion of the cylinder, showing one of the ports. Fig. 5 is a detailed plan view looking down upon the governor.

Similar figures refer to similar parts in the several views shown.

In applying my improvements I do not confine myself to any particular make or style of gas or other explosive engine. Therefore the one shown is sufficient to illustrate my improvements and the advantages derived therefrom.

The cylinder 1 and heads 2 and 3 form the cylinder, which is provided with the usual piston-rod 10 and piston 9, exhaust-valves 4 and 7, air-valves 6 and 8, and gas-valve 5. Any suitable arrangement may be attached to operate the said air-valves 6 and 8 and the exhaust-valve 4:, so that they may be opened and closed at the proper time,,and a suitable explosive device is assumed to be attached to explode the gas at the proper moment. Vithin the interior of the cylinder are form ed the ports 11, any number of which may be formed. Arranged loosely upon the brackets 40, which project from .the sides of the cylinder and parallel therewith, is the shaft 12, which is suitably connected to the main shaft for revolving the same at the proper speed. Secured fast to the said shaft are the earns 13, 14:, and 15. Connected to the stem of the exhaust-valve 7 is the double rockerarm 16, which is pivoted or loosely mounted upon the bracket 17, which is formed upon the cylinder. Secured fast to the opposite end of the said rocker-arm is the shaft 18, which extends out a short distance parallel with the cylinder. Loosely secured within a shoulder formed upon the said shaft is the small lifting-wheel 19, which is adapted to engage with the cam 14 for the purpose of opening the exhaust-valve. Loosely arranged upon the'same shaft is the lifting-wheel 21,the action of which will be explained later. Loosely mounted or connected upon the bracket 26 is another double rocker-arm 25, the upper end of which is connected to the stem of the gas-valve 5 and has secured fast to its opposite end the shaft 20, which also extends out a short distance parallel with the cylinder and has loosely mounted thereon the lifting-wheel 22.

23 is a shifterbar having prongs 23 arranged astride of the loosely-mounted wheels 21 22 and is actuated, as hereinafter disclosed, by a governor 50, a right-angled lever 50,connecting said shifterbar with a sleeve 51, loosely carried upon a sliding hollow shaft 52, through which passes the weighted governorshaft 53, geared with and driven by a shaft 54, suitably driven by the main shaft at the required or given rates of movement, as will be readily appreciated by artisans familiar with this art. The governor-shaft 53 has projecting at each'side a pin 54, extending through vertical slots 55 in the sleeve 52, and upon this pin are pivoted the forked inner ends of the arms of the governor-balls56, said arms having elbows adapted to engage lateral plate extensions or wings 57 on said sleeve 52 above said arms.

The operation of the parts of the governor and its action upon the shaft-bar will be apparent farther on.

The operation of the engine is as follows:

The air-valve 6 and gas-valve 5' having opened and admitted air and gas to the rear end of the cylinder, and the piston 9 having traveled to the forward end of the cylinder on the first forward stroke and upon its backward stroke to the rear end, the gas and air in the said rear end is compressed and ignited, which forces the piston forward on its second stroke and when the said piston is over the ports 11 the expanded air and gas in the rear end of the cylinder escapes through the said ports into the forward end,- (which in the meantime has received air from the valve 8 and been compressed,) and the gas and air in the rear end being greater in pressure it escapes into the forward end of the cylinder, as stated, and forces the piston back to the rear end, and the exhaust-valve 4 opens and exhausts the balance of the expanded air and gas within that end of the cylinder. The piston then travels on its next forward stroke, during which the cam 14: comes into contact with the wheel 19, which operates the rockerarm 16, opening the exhaust-valve 7 and exhausting the expanded air and gas within that end of the cylinder, thus preventing the retarding of the piston; and in the meantime the governor has automatically shifted the shifter-rod 23 and loosely-mounted Wheels 21 and 22, so that the wheel 22 (which formerly operated with the cam 13 for working the gas-valve) is thrown out of contact with the said cam, thus preventing any gas being admitted to the cylinder and at the same time bringing the Wheel 21 into position with the cam 15 to operate the exhaust-valve. The exhaust-operating cams la. and 15 continue to operate each in their proper turn with the wheels 19 and 21 to open the exhaust-valve 7 until the speed of the engine is reduced, when the governor will automatically shift the wheels and bar back to their former position, allowing the gas-valve to operate as before.

It will be readily seen that the gas and exhaust-valve mechanism described is practical and simple in its operation and construction,

and, as stated, may be arranged for a triplestroke engine as well as a double stroke.

Having thus fullyshown and described my invention, what I claim as new, and desire to secure by Letters Patent, is

1. The combination of the power-cylinder having a gas-inlet valve at one end, an exhaust-valve at its opposite end and recessports arranged intermediately of said valves and opening into the chamber or interior of v I haust-valve at its opposite end and ports ar- I ranged intermediately of said valves, devices for automatically actuating said valves, the shifter-bar connecting said valve-actuating devices at both ends of the cylinder and a governor controlling the movement of said shifter-bar, substantially as set forth.

3. The combination of the power-cylinder having a springpressed gas-inlet valve at one end, a spring-pressed valve at its opposite end and ports arranged intermediately of said valves, the rocker-arms connected with said gas inlet and exhaust valves and carrying wheels, the supplemental shaft having cams adapted to engage said Wheels, the shifter-bar connecting one of said wheels on each of said rocker-arms, and the governor connected to said shifter-bar, substantially as set forth.

In testimony whereof I afiix my signature in presence of two witnesses. MILDRED BLAKEY.

- Witnesses:

JAs. J. MGAFEE, RICHARD S; HARRISON. 

